<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    //创建了一个“空”的对象
    let o = {}

    //接着利用js的动态特性，运行时随时随地给对象添加新的成员（member）
    o.name="abc"
    o.work = function(){
      console.log("我在工作");
    }

    let name = o.name
    o.work()
  </script>
</body>
</html>